Callstack
@callstackengineers · YouTube · Poland
Helping teams ship better cross-platform apps, with React, React Native, and Open Source at the core. We’re Callstack: Open Source contributors, core contributors to React Native, and active members of the community pushing the React Universe forward. Here you’ll find what we live and breathe every day: Podcast 🎙️ React Universe On Air, with insights from across the React ecosystem Event Recordings 🎥 Livestreams, talks, and behind-the-scenes from React Universe Conf & React Conf Tutorials 📚 Hands-on guides and deep dives into React and React Native Webinars ⚙️ Technical sessions on building full-stack, cross-platform apps If you’re into building better apps, scaling real products, and being part of a global community that shares what it knows—you’re in the right place.
21.2K
Subscribers
1.3M
Total views
689
Videos
383.6
Avg. views / video
0.06%
Engagement rate
Here's how Callstack measures up on YouTube: 21.2K subscribers, 1.3M lifetime views, and 383.6 average views per upload with 0.06% engagement.
Everything on this page is drawn from InstMe's index and refreshes with each rescan. For sponsorship decisions, weigh the per-video reach and engagement more heavily than the subscriber count — that's where campaign performance actually shows up.
Audience & content
Publishing Activity
Dormant
Last upload Apr 17, 2026 · ≈6.8 uploads/month lifetime.
Audience (estimated)
Est.Roughly balanced · mostly 18–34
Typical for Education creators in Poland, modeled from the topic — not measured for this channel.
Content Focus
Primary: Knowledge
Secondary: Technology
Callstack vs similar channels
| Metric | Callstack | Cohort median |
|---|---|---|
| Avg. views per video | 383.6 | 3.4K |
| Engagement rate | 0.06% | 0.36% |
| Videos published | 689 | 237 |
Median values from 4,448 YouTube channels with 10K–100K subscribers in the InstMe index, refreshed daily.
Estimated sponsorship value
$5.8–$13per dedicated video
Based on 383.6 average views per video, a dedicated sponsored video on Callstack is worth an estimated $5.8–$13. This is a modeled range from view counts and typical YouTube CPMs, not a quoted rate — actual pricing depends on niche, format, usage rights and exclusivity.
Frequently asked questions
How many subscribers does Callstack have?
Callstack has 21.2K subscribers on YouTube, with 1.3M total channel views across 689 videos.
What is Callstack's YouTube handle?
Callstack publishes on YouTube as @callstackengineers.
How many views does Callstack get per video?
Callstack averages 383.6 views per video. Views-per-video is usually a better sponsorship predictor than the subscriber count alone.
What is Callstack's engagement rate?
Callstack's measured engagement rate is 0.06% (likes and comments relative to views on recent videos).
How much does a sponsored video from Callstack cost?
Based on 383.6 average views per video, a dedicated sponsored video on Callstack is worth an estimated $5.8–$13. This is a modeled range from view counts and typical YouTube CPMs, not a quoted rate — actual pricing depends on niche, format, usage rights and exclusivity.
Is Callstack still active on YouTube?
Callstack's most recent video was published on April 17, 2026.
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Subscribers, view performance, engagement and estimated sponsorship value — live numbers for any channel, plus millions of creators across platforms in the full InstMe index.